WO2020261897A1

WO2020261897A1 - Illumination device

Info

Publication number: WO2020261897A1
Application number: PCT/JP2020/021792
Authority: WO
Inventors: 中野　貴之; 北野　博史
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2019-06-25
Filing date: 2020-06-02
Publication date: 2020-12-30
Also published as: TWI725878B; CN217329736U; TW202100906A; JP7291884B2; JP2021005444A

Abstract

An illumination device (100) is embedded in a partition (10) that defines a first space (11) and a second space (12) different from the first space (11), the illumination device comprising: a light source unit (120); a cooling mechanism (140) that generates an air flow for cooling the light source unit (120); and a housing (110) that accommodates the light source unit (120) and the cooling mechanism (140), and that is attached to a ceiling panel (10) so that light emitted from the light source unit (120) proceeds to the first space (11) while the housing is disposed in the second space (12). The housing (110) includes: an intake port (102) that takes in outside air using an air flow generated by the cooling mechanism (140), and an exhaust port (103) that discharges the air flow. The intake port (102) is disposed at a position facing the first space (11).

Description

Lighting device

The present invention relates to a lighting device.

Conventionally, there is a lighting system that creates a space by using a projector, which is a light projection device, instead of a lighting device (light). In such a lighting system, the light projection device is installed, for example, in a state of being suspended from the ceiling.

Japanese Unexamined Patent Publication No. 2016-161882

In recent years, in order to enhance the aesthetic appearance of a lighting space, it has been studied to embed a lighting device (light projection device) in a compartment (for example, ceiling, floor, wall, etc.) that divides the lighting space. In the building, the space on the opposite side of the lighting space partitioned by the compartments (for example, the ceiling, underfloor, and wall) is a closed space, so there is more dust than the lighting space. ing.

Here, the lighting device is provided with a cooling mechanism that takes in and exhausts the outside air, but if the lighting device is embedded in the compartment, the lighting device takes in dust from the closed space and the quality deteriorates. The possibility of doing it increases.

An object of the present invention is to provide a lighting device capable of maintaining long-term quality by suppressing suction of dust from a closed space even if it is embedded in a compartment.

The lighting device according to one aspect of the present invention is a lighting device embedded in a partition body that partitions a first space and a second space different from the first space, and is a light source unit and a light source unit. A cooling mechanism that generates an air flow to cool the air, a light source unit, and a cooling mechanism are housed, and in a state of being arranged in the second space, a partition is provided so as to emit light from the light source unit to the first space. A housing attached to the body is provided, and the housing has an intake port for taking in outside air with an air flow generated by a cooling mechanism and an exhaust port for exhausting the air flow, and the intake port is first. It is located at a position facing the space.

According to the lighting device according to the present invention, even if it is embedded in a compartment, the quality can be maintained for a long period of time by suppressing the suction of dust from the closed space.

FIG. 1 is a cross-sectional view showing a schematic configuration of a lighting device according to an embodiment. FIG. 2 is a block diagram showing a control configuration of the lighting device according to the embodiment. FIG. 3 is a cross-sectional view showing a schematic configuration of the lighting device according to the first modification. FIG. 4 is a cross-sectional view showing a schematic configuration of the lighting device according to the second modification. FIG. 5 is a cross-sectional view showing a schematic configuration of the lighting device according to the third modification. FIG. 6 is a cross-sectional view showing a schematic configuration of the lighting device according to the modified example 4.

Hereinafter, the lighting device according to the embodiment of the present invention will be described with reference to the drawings. It should be noted that all of the embodiments described below show a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement of components, connection forms, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

In addition, each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, the same components are designated by the same reference numerals.

[Embodiment]
Hereinafter, embodiments will be described. First, a usage mode of the lighting device according to the embodiment will be described. FIG. 1 is a cross-sectional view showing a schematic configuration of a lighting device according to an embodiment. As shown in FIG. 1, the lighting device 100 is attached to the ceiling plate 10 in the building. The ceiling plate 10 is an example of a compartment that partitions the first space 11 which is the living space of the building and the second space 12 which is the ceiling. The second space 12 is a closed space that is normally closed. Therefore, the second space 12 is a space that is difficult to be cleaned and easily collects dust and the like.

The lighting device 100 is fitted and fixed to the opening 13 provided in the ceiling plate 10. The light irradiation surface 101 of the lighting device 100 is exposed from the surface of the ceiling plate 10 (the main surface on the first space 11 side). In addition, most of the lighting device 100 is arranged in the second space 12.

Next, the configuration of the lighting device 100 will be described. The lighting device 100 includes a housing 110, a light source unit 120, an image element 130, a cooling mechanism 140, an intake duct 150, and an exhaust duct 160.

The housing 110 houses a light source unit 120, a cooling mechanism 140, an image element 130, an intake duct 150, and an exhaust duct 160. The housing 110 is, for example, a case made of a substantially rectangular parallelepiped resin or metal. One surface of the housing 110 is a light irradiation surface 101, and light is emitted from the light irradiation surface 101. Specifically, a projection lens 111 is embedded in a part of the light irradiation surface 101, and light (see the alternate long and short dash line in FIG. 1) is emitted downward from the projection lens 111. The irradiation direction of the light from the projection lens 111 may be a direction intersecting the light irradiation surface 101.

Further, an intake port 102 and an exhaust port 103 are formed on a part of the light irradiation surface 101. Specifically, the intake port 102 and the exhaust port 103 are arranged so as to sandwich the projection lens 111 in a cross-sectional view. The intake port 102 and the exhaust port 103 are arranged at positions facing the first space 11.

The entire intake port 102 is covered with a replaceable first filter 104. The exhaust port 103 is entirely covered with a replaceable second filter 105. The housing 110 is sealed except for the intake port 102 and the exhaust port 103, and the inside and the outside of the housing 110 cannot be ventilated from the parts other than the intake port 102 and the exhaust port 103. ..

The first filter 104 is a dust collecting filter, and removes dust and oil that are about to enter the housing 110 from the intake port 102. The second filter 105 is a dust collecting filter, and removes dust and oil that are about to enter the housing 110 from the exhaust port 103.

The light source unit 120 is a device that irradiates the image element 130 with light. Examples of the light source provided in the light source unit 120 include a mercury lamp, an LED (Light Emitting Diode), and an LD (Laser Diode). Both light sources serve as heat sources and become hot when irradiated with light. The light source unit 120 may have a plurality of light sources that emit red light, blue light, and green light, respectively. Further, the light source unit 120 may have only one light source of colored light, and may have a phosphor wheel for wavelength-converting the colored light emitted by the light source into different colored light.

The image element 130 is an element that forms a projected image by the light from the light source unit 120. Examples of the image element 130 include a transmissive liquid crystal element, a reflective liquid crystal element, and a DMD (Digital Micromirror Device). In FIG. 1, the image element 130 is shown assuming a reflective liquid crystal element or a DMD. The image sensor 130 also serves as a heat source during driving and becomes hot.

In the present embodiment, although not shown, the inside of the housing 110 is an optical system that guides the light emitted from the light source unit 120 to the image element 130, and the light reflected by the image element 130 is projected lens 111. There is an optical system that guides you to.

The cooling mechanism 140 is a mechanism for cooling the heat source (light source unit 120, image element 130, etc.) in the housing 110. Specifically, the cooling mechanism 140 includes a first fan 141 and a second fan 142. The first fan 141 is arranged in the vicinity of the intake port 102 in the housing 110. The first fan 141 is driven to rotate to draw the air in the first space 11 into the housing 110 from the intake port 102. The second fan 142 is arranged in the vicinity of the exhaust port 103 in the housing 110. The second fan 142 is rotationally driven to discharge the air in the housing 110 from the exhaust port 103 toward the first space 11. In FIG. 1, the airflow generated in the housing 110 by driving the first fan 141 and the second fan 142 is indicated by a broken line arrow. Since the light source unit 120 and the image element 130 are arranged along this air flow, the light source unit 120 and the image element 130 can be efficiently cooled by only one air flow generated by the cooling mechanism 140. In particular, since the light source unit 120 having a large heat generation amount is arranged on the upstream side of the image element 130, the light source unit 120 can be efficiently cooled by the air just taken in from the first space 11.

The intake duct 150 is, for example, a duct made of metal or resin arranged in the housing 110. The intake duct 150 guides the air flow generated by the cooling mechanism 140 from the intake port 102 to the light source unit 120. Specifically, one end of the intake duct 150 is arranged near the intake port 102 so as to surround the intake port 102, and the other end is arranged near the light source unit 120. The first fan 141 is housed in the intake duct 150. As a result, the airflow generated by driving the first fan 141 can be reliably passed through the intake duct 150.

The exhaust duct 160 is, for example, a duct made of metal or resin arranged in the housing 110. The exhaust duct 160 guides the airflow generated by the cooling mechanism 140 to the exhaust port 103. Specifically, one end of the exhaust duct 160 is arranged in the vicinity of the image sensor 130 which is a heat source, and the other end is arranged in the vicinity of the exhaust port 103 so as to surround the exhaust port 103. .. A second fan 142 is housed in the exhaust duct 160. As a result, the airflow generated by driving the second fan 142 can be reliably passed through the exhaust duct 160.

FIG. 2 is a block diagram showing a control configuration of the lighting device according to the embodiment. As shown in FIG. 2, the lighting device 100 includes a light source unit 120, an image element 130, and a control unit 170 that controls a cooling mechanism 140. The control unit 170 includes a CPU, a ROM, a RAM, and the like, and the CPU reads a program stored in the ROM and expands the program in the RAM to execute various processes. The image data of the image formed by the image sensor 130 is stored in the ROM in advance. The control unit 170 may acquire image data from an external device such as a smartphone, a PC, or a remote controller via the communication unit 190.

When the power is turned on, the control unit 170 drives the light source unit 120, the image sensor 130, the first fan 141, and the second fan 142. As a result, light is emitted from the projection lens 111 toward the first space 11 directly under the lighting device 100. Further, in the housing 110, an air flow is generated from the intake port 102 to the exhaust port 103, and the light source unit 120 and the image element 130 are cooled. If other heat sources such as a circuit board and a power supply board on which the control unit 170 is mounted are also arranged in the flow path of the air flow caused by the cooling mechanism 140, the other heat sources can be cooled efficiently. It is possible.

[Effects, etc.]
As described above, according to the present embodiment, the lighting device embedded in the ceiling plate 10 (compartment body) that partitions the first space 11 and the second space 12 different from the first space 11. In the state of 100, the light source unit 120, the cooling mechanism 140 for generating an air flow for cooling the light source unit 120, the light source unit 120, and the cooling mechanism 140 are housed and arranged in the second space 12. A housing 110 attached to the ceiling plate 10 so as to emit light from the light source unit 120 to the first space 11 is provided, and the housing 110 takes in outside air by the airflow generated by the cooling mechanism 140. The intake port 102 has an intake port 102 and an exhaust port 103 for exhausting the air flow, and the intake port 102 is arranged at a position facing the first space 11.

According to this, since the intake port 102 is arranged at a position facing the first space 11, outside air can be taken into the housing 110 from the first space 11 via the intake port 102. Since the first space 11 is a cleaner space than the second space 12, dust is less likely to be taken into the housing 110. In this way, even if the lighting device 100 is embedded in the ceiling plate 10, it is possible to suppress the suction of dust from the second space 12, which is the closed space. Therefore, it is possible to maintain the quality of the lighting device 100 for a long period of time.

In addition, the second space 12, which is a closed space, may have a high temperature depending on the season. For example, when the second space 12 is behind the ceiling, there is also a building environment where the temperature is 60 ° C to 70 ° C in the summer. However, if the intake port 102 is arranged at a position facing the first space 11 as in the present embodiment, air is introduced into the housing 110 from the first space 11 which is not hotter than the second space 12. It can be taken into the air and can be cooled efficiently.

Further, the exhaust port 103 is arranged at a position facing the first space 11 and different from the intake port 102.

According to this, since the exhaust port 103 is arranged at a position facing the first space 11, the air warmed by the heat source in the housing 110 can be exhausted to the first space 11. As a result, it is possible to prevent heat from being trapped in the second space 12 due to exhaust gas. Further, since the exhaust port 103 is arranged at a position facing the first space 11, dust in the second space 12 can enter the exhaust port 103 even when no air flow is generated such as when stopped. Can be prevented.

Further, the lighting device 100 has a first filter 104 that covers the intake port 102.

According to this, since the intake port 102 is covered with the first filter 104, even if dust or oil is to be sucked from the intake port 102, the dust can be removed by the first filter 104. Therefore, the dust that enters the housing 110 can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

Further, the lighting device 100 has a second filter 105 that covers the exhaust port 103.

According to this, since the exhaust port 103 is covered with the second filter 105, even if dust or oil tries to enter from the exhaust port 103, the dust can be removed by the second filter 105. Therefore, the dust that enters the housing 110 can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

Further, the lighting device 100 is arranged in the housing 110 and has an image element 130 for forming an image due to the light from the light source unit 120.

According to this, since the image element 130 forms an image due to the light from the light source unit 120, various forms of illumination light can be realized. Further, the image element 130 also serves as a heat source during driving, but since an air flow is generated in the housing 110 by the cooling mechanism 140, the image element 130 can also be cooled. As described above, since the structure is such that dust does not easily enter the housing 110, dust does not easily adhere to the image sensor 130. Therefore, the quality of the image sensor 130 can be maintained for a long period of time.

Further, the lighting device 100 is arranged in the housing 110 and has an intake duct 150 that guides the air flow generated by the cooling mechanism 140 from the intake port 102 to the light source unit 120.

According to this, since the intake duct 150 guides the air flow from the cooling mechanism 140 from the intake port 102 to the light source unit 120, the light source unit 120 can be cooled smoothly. Therefore, the cooling efficiency can be further improved, and the quality of the lighting device 100 can be maintained for a longer period of time.

Further, the lighting device 100 is arranged in the housing 110 and has an exhaust duct 160 that guides the airflow generated by the cooling mechanism 140 to the exhaust port 103.

According to this, since the exhaust duct 160 guides the airflow from the cooling mechanism 140 to the exhaust port 103, warm air can be smoothly discharged to the outside of the housing 110. Therefore, heat is less likely to be trapped in the housing 110, and as a result, the cooling efficiency can be further improved. Therefore, the quality of the lighting device 100 can be maintained for a longer period of time.

[Modification 1]
Next, a modification 1 will be described. The first modification is different from the above embodiment in that the housing is provided with a second exhaust port for exhausting the airflow generated by the cooling mechanism toward the second space. In the following description, in the same parts as the lighting device 100 according to the above embodiment, the same reference numerals may be given and the description thereof may be omitted.

FIG. 3 is a cross-sectional view showing a schematic configuration of the lighting device according to the first modification. As shown in FIG. 3, the housing 110a of the lighting device 100A is provided with a second exhaust port 107 at a position facing the second space 12. Specifically, the second exhaust port 107 is a surface of the housing 110a opposite to the light irradiation surface 101, and is arranged at a position facing the exhaust port 103. The second exhaust port 107 may be arranged in any part of the housing 110a as long as it faces the second space 12. The second exhaust port 107 is entirely covered with a replaceable third filter 108.

Further, the lighting device 100A has a second exhaust duct 180. The second exhaust duct 180 is, for example, a duct made of metal or resin arranged in the housing 110. The second exhaust duct 180 guides the airflow generated by the cooling mechanism 140 to the second exhaust port 107. Specifically, one end of the second exhaust duct 180 is arranged in the vicinity of the image element 130 which is a heat source, and the other end is in the vicinity of the second exhaust port 107 and surrounds the second exhaust port 107. It is arranged like this. One end of the second exhaust duct 180 is arranged in the vicinity of one end of the exhaust duct 160. The second fan 142 is arranged on the upstream side of one end of the second exhaust duct 180 and one end of the exhaust duct 160. As a result, the airflow generated by the second fan 142 is divided into the exhaust duct 160 and the second exhaust duct 180, and is exhausted from the exhaust port 103 and the second exhaust port 107 to the outside of the housing 110a, respectively.

As described above, the housing 110a has a second exhaust port 107 that exhausts the airflow generated by the cooling mechanism 140 toward the second space 12.

According to this, since the air is exhausted from the second exhaust port 107 toward the second space 12, it is possible to ventilate the inside of the second space 12 with warmed air. Therefore, the humidity in the second space 12 can be lowered. That is, while cooling the heat source of the lighting device 100, the humidity of the second space 12 which is a closed space can be lowered, and dew condensation of the building can be suppressed. If the dew condensation on the building is reduced, the failure of the lighting device 100A due to the dew condensation can be suppressed. Therefore, the quality of the lighting device 100A can be maintained for a long period of time.

Further, the lighting device 100A has a third filter 108 that covers the second exhaust port 107.

According to this, since the second exhaust port 107 is covered with the third filter 108, even if dust tries to enter through the second exhaust port 107, the dust can be removed by the third filter 108. .. Therefore, the dust that enters the housing 110a can be further suppressed, and the quality of the lighting device 100 can be maintained for a longer period of time.

[Modification 2]
Next, the second modification will be described. The second modification is different from the first modification in that the exhaust port 103 and the exhaust duct 160 are removed from the lighting device 100A according to the first modification. In the following description, in the same parts as the lighting device 100A according to the first modification, the same reference numerals may be given and the description thereof may be omitted.

FIG. 4 is a cross-sectional view showing a schematic configuration of the lighting device according to the second modification. As shown in FIG. 4, the housing 110b of the lighting device 100B is provided with a second exhaust port 107 at a position facing the second space 12, but an exhaust port 107 at a position facing the first space 11. Is not provided. Further, the second fan 142 is housed in the second exhaust duct 180. Therefore, the airflow generated by driving the second fan 142 can be reliably passed through the second exhaust duct 180.

Here, since the second exhaust port 107 is provided above the heat source, even if the second fan 142 does not drive due to a malfunction or the like, exhaust can be smoothly performed by convection. Further, in the case of the second modification, since all the airflow in the housing 110b is discharged from the second exhaust port 107, the ventilation effect on the second space 12 which is a closed space can be further enhanced.

[Modification 3]
Next, a modification 3 will be described. The third modification is different from the embodiment in that the lighting device is attached to the wall plate. In the following description, in the same parts as the lighting device 100 according to the above embodiment, the same reference numerals may be given and the description thereof may be omitted.

FIG. 5 is a cross-sectional view showing a schematic configuration of the lighting device according to the modified example 3. As shown in FIG. 5, the lighting device 100C according to the third modification is attached to the wall plate 10c in the building. The wall plate 10c is an example of a compartment that partitions the first space 11 which is the living space of the building and the second space 12c which is the internal space of the wall. The second space 12c is a closed space that is normally closed. Therefore, the second space 12c is a space that is difficult to be cleaned and easily collects dust and the like.

The lighting device 100C is fitted and fixed to the opening 13c provided in the wall plate 10c. The light irradiation surface 101 in the lighting device 100C is exposed from the surface of the wall plate 10c (the main surface on the first space 11 side). Most of the lighting device 100C is arranged in the second space 12c.

In the lighting device 100C attached to the wall plate 10c, when the light source unit 120, the image element 130, the first fan 141, and the second fan 142 are driven by the control of the control unit 170, the side of the lighting device 100C , Light is emitted from the projection lens 111 toward the first space 11. Further, in the housing 110, an air flow is generated from the intake port 102 to the exhaust port 103, and the light source unit 120 and the image element 130 are cooled. Here, since the intake port 102 is arranged at a position facing the first space 11, outside air can be taken into the housing 110 from the first space 11 via the intake port 102. Since the first space 11 is a cleaner space than the second space 12c, it is difficult for dust to be taken into the housing 110. In this way, even if the lighting device 100C is embedded in the wall plate 10c, it is possible to suppress the suction of dust from the second space 12c, which is a closed space. Therefore, it is possible to maintain the quality of the lighting device 100C for a long period of time.

Regarding other points, the lighting device 100C according to the third modification can exert the same effect as the lighting device 100 of the above embodiment.

[Modification example 4]
Next, a modification 4 will be described. The fourth modification is different from the embodiment in that the lighting device is attached to the floor plate. In the following description, in the same parts as the lighting device 100 according to the above embodiment, the same reference numerals may be given and the description thereof may be omitted.

FIG. 6 is a cross-sectional view showing a schematic configuration of the lighting device according to the modified example 4. As shown in FIG. 6, the lighting device 100D according to the modified example 4 is attached to the floor plate 10d in the building. The floor plate 10d is an example of a compartment that partitions the first space 11 which is the living space of the building and the second space 12d which is under the floor. The second space 12d is a closed space that is normally closed. Therefore, the second space 12d is a space that is difficult to be cleaned and easily collects dust and the like.

The lighting device 100D is fitted and fixed to the opening 13d provided in the floor plate 10d. The light irradiation surface 101 in the lighting device 100D is exposed from the surface of the floor plate 10d (main surface on the first space 11 side). Most of the lighting device 100D is arranged in the second space 12d.

In the lighting device 100D attached to the floor plate 10d, when the light source unit 120, the image element 130, the first fan 141, and the second fan 142 are driven by the control of the control unit 170, projection is performed above the lighting device 100D. Light is emitted from the lens 111 toward the first space 11. Further, in the housing 110, an air flow is generated from the intake port 102 to the exhaust port 103, and the light source unit 120 and the image element 130 are cooled. Here, since the intake port 102 is arranged at a position facing the first space 11, outside air can be taken into the housing 110 from the first space 11 via the intake port 102. Since the first space 11 is a cleaner space than the second space 12d, it is difficult for dust to be taken into the housing 110. In this way, even if the lighting device 100D is embedded in the floor plate 10d, it is possible to suppress the suction of dust from the second space 12d, which is a closed space. Therefore, it is possible to maintain the quality of the lighting device 100D for a long period of time.

Further, with respect to other points, the lighting device 100D according to the modified example 4 can exert the same effect as the lighting device 100 of the above embodiment.

When the lighting device 100D is attached to the floor plate 10d, the entire intake port 102 and the exhaust port 103 are covered with a water-impervious ventilation sheet so that the liquid spilled on the floor plate 10d does not enter the intake port 102 and the exhaust port 103. You may cover it. Further, in order to protect the floor plate 10d from walking people and pets, the entire intake port 102 and exhaust port 103 may be covered with a rigid mesh body having a plurality of through holes.

[Other]
The lighting device according to the present invention has been described above based on the above-described embodiment and each modification, but the present invention is not limited to the above-described embodiment and each modification. For example, the present invention may have a configuration obtained by combining the above-described embodiment and each modification.

In the above embodiment, the lighting device 100 including the image element 130 is illustrated, but the lighting device may not be provided with the image element.

Further, in the above embodiment, the illuminating device 100 including the first filter 104 and the second filter 105 is illustrated, but the illuminating device does not have to include at least one of the first filter and the second filter.

Further, in the above embodiment, the lighting device 100 provided with the intake duct 150 and the exhaust duct 160 is illustrated, but the lighting device may not include at least one of the intake duct 150 and the exhaust duct 160.

Further, in the above embodiment, the case where the cooling mechanism 140 includes the first fan 141 and the second fan 142 is illustrated, but the cooling mechanism may have at least one fan. When only one fan is provided, the fan may be arranged on the exhaust port side.

Further, in the above embodiment, the case where the lighting device 100 is fitted into the opening 13 provided in the ceiling plate 10 is illustrated. The lighting device may be mounted on the ceiling board. In this case, an opening may be formed in the ceiling plate to expose the projection lens, the intake port, and the exhaust port.

In addition, a form obtained by applying various modifications to the embodiment that a person skilled in the art can think of, or a form realized by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. Is also included in the present invention.

10 Ceiling board (compartment body)
10c wall board (compartment body)
10d floor board (compartment body)
11

First space

12, 12c,

12d Second space

100, 100A, 100B, 100C, 100D Lighting device 102 Intake port 103 Exhaust port 104 First filter 105 Second filter 107 Second exhaust port 108

Third filter

110, 110a, 110b Housing 120 Light source 130 Image element 140 Cooling mechanism 141 First fan 142 Second fan 150 Intake duct 160 Exhaust duct 180 Second exhaust duct

Claims

A lighting device embedded in a partition body that partitions a first space and a second space different from the first space.
Light source and
A cooling mechanism that generates an air flow to cool the light source unit,
A housing attached to the compartment so as to accommodate the light source unit and the cooling mechanism and to emit light from the light source unit to the first space in a state of being arranged in the second space. And with
The housing has an intake port for taking in outside air with an air flow generated by the cooling mechanism and an exhaust port for exhausting the air flow.
The intake port is a lighting device arranged at a position facing the first space.
The lighting device according to claim 1, wherein the exhaust port is located at a position facing the first space and at a position different from the intake port.
The lighting device according to claim 1 or 2, which has a first filter that covers the intake port.
The lighting device according to any one of claims 1 to 3, further comprising a second filter covering the exhaust port.
The lighting device according to any one of claims 1 to 4, which is arranged in the housing and has an image element for forming an image due to the light from the light source unit.
The lighting device according to any one of claims 1 to 5, which is arranged in the housing and has an intake duct for guiding an air flow generated by the cooling mechanism from the intake port to the light source unit.
The lighting device according to any one of claims 1 to 6, which is arranged in the housing and has an exhaust duct for guiding the airflow generated by the cooling mechanism to the exhaust port.
The lighting device according to any one of claims 1 to 7, wherein the housing has a second exhaust port that exhausts the airflow generated by the cooling mechanism toward the second space.
The lighting device according to claim 8, further comprising a third filter covering the second exhaust port.
The lighting device according to any one of claims 1 to 9, wherein each of the intake port and the exhaust port is covered with an impermeable ventilation sheet.